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<FONT color="green">001</FONT>    /*<a name="line.1"></a>
<FONT color="green">002</FONT>     * Licensed to the Apache Software Foundation (ASF) under one or more<a name="line.2"></a>
<FONT color="green">003</FONT>     * contributor license agreements.  See the NOTICE file distributed with<a name="line.3"></a>
<FONT color="green">004</FONT>     * this work for additional information regarding copyright ownership.<a name="line.4"></a>
<FONT color="green">005</FONT>     * The ASF licenses this file to You under the Apache License, Version 2.0<a name="line.5"></a>
<FONT color="green">006</FONT>     * (the "License"); you may not use this file except in compliance with<a name="line.6"></a>
<FONT color="green">007</FONT>     * the License.  You may obtain a copy of the License at<a name="line.7"></a>
<FONT color="green">008</FONT>     *<a name="line.8"></a>
<FONT color="green">009</FONT>     *      http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a>
<FONT color="green">010</FONT>     *<a name="line.10"></a>
<FONT color="green">011</FONT>     * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a>
<FONT color="green">012</FONT>     * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a>
<FONT color="green">013</FONT>     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a>
<FONT color="green">014</FONT>     * See the License for the specific language governing permissions and<a name="line.14"></a>
<FONT color="green">015</FONT>     * limitations under the License.<a name="line.15"></a>
<FONT color="green">016</FONT>     */<a name="line.16"></a>
<FONT color="green">017</FONT>    <a name="line.17"></a>
<FONT color="green">018</FONT>    package org.apache.commons.lang3.event;<a name="line.18"></a>
<FONT color="green">019</FONT>    <a name="line.19"></a>
<FONT color="green">020</FONT>    import java.io.ByteArrayOutputStream;<a name="line.20"></a>
<FONT color="green">021</FONT>    import java.io.IOException;<a name="line.21"></a>
<FONT color="green">022</FONT>    import java.io.ObjectInputStream;<a name="line.22"></a>
<FONT color="green">023</FONT>    import java.io.ObjectOutputStream;<a name="line.23"></a>
<FONT color="green">024</FONT>    import java.io.Serializable;<a name="line.24"></a>
<FONT color="green">025</FONT>    import java.lang.reflect.Array;<a name="line.25"></a>
<FONT color="green">026</FONT>    import java.lang.reflect.InvocationHandler;<a name="line.26"></a>
<FONT color="green">027</FONT>    import java.lang.reflect.Method;<a name="line.27"></a>
<FONT color="green">028</FONT>    import java.lang.reflect.Proxy;<a name="line.28"></a>
<FONT color="green">029</FONT>    import java.util.ArrayList;<a name="line.29"></a>
<FONT color="green">030</FONT>    import java.util.List;<a name="line.30"></a>
<FONT color="green">031</FONT>    import java.util.concurrent.CopyOnWriteArrayList;<a name="line.31"></a>
<FONT color="green">032</FONT>    <a name="line.32"></a>
<FONT color="green">033</FONT>    import org.apache.commons.lang3.Validate;<a name="line.33"></a>
<FONT color="green">034</FONT>    <a name="line.34"></a>
<FONT color="green">035</FONT>    /**<a name="line.35"></a>
<FONT color="green">036</FONT>     * An EventListenerSupport object can be used to manage a list of event<a name="line.36"></a>
<FONT color="green">037</FONT>     * listeners of a particular type. The class provides<a name="line.37"></a>
<FONT color="green">038</FONT>     * {@link #addListener(Object)} and {@link #removeListener(Object)} methods<a name="line.38"></a>
<FONT color="green">039</FONT>     * for registering listeners, as well as a {@link #fire()} method for firing<a name="line.39"></a>
<FONT color="green">040</FONT>     * events to the listeners.<a name="line.40"></a>
<FONT color="green">041</FONT>     *<a name="line.41"></a>
<FONT color="green">042</FONT>     * &lt;p/&gt;<a name="line.42"></a>
<FONT color="green">043</FONT>     * To use this class, suppose you want to support ActionEvents.  You would do:<a name="line.43"></a>
<FONT color="green">044</FONT>     * &lt;code&gt;&lt;pre&gt;<a name="line.44"></a>
<FONT color="green">045</FONT>     * public class MyActionEventSource<a name="line.45"></a>
<FONT color="green">046</FONT>     * {<a name="line.46"></a>
<FONT color="green">047</FONT>     *   private EventListenerSupport&lt;ActionListener&gt; actionListeners =<a name="line.47"></a>
<FONT color="green">048</FONT>     *       EventListenerSupport.create(ActionListener.class);<a name="line.48"></a>
<FONT color="green">049</FONT>     *<a name="line.49"></a>
<FONT color="green">050</FONT>     *   public void someMethodThatFiresAction()<a name="line.50"></a>
<FONT color="green">051</FONT>     *   {<a name="line.51"></a>
<FONT color="green">052</FONT>     *     ActionEvent e = new ActionEvent(this, ActionEvent.ACTION_PERFORMED, "somethingCool");<a name="line.52"></a>
<FONT color="green">053</FONT>     *     actionListeners.fire().actionPerformed(e);<a name="line.53"></a>
<FONT color="green">054</FONT>     *   }<a name="line.54"></a>
<FONT color="green">055</FONT>     * }<a name="line.55"></a>
<FONT color="green">056</FONT>     * &lt;/pre&gt;&lt;/code&gt;<a name="line.56"></a>
<FONT color="green">057</FONT>     *<a name="line.57"></a>
<FONT color="green">058</FONT>     * Serializing an {@link EventListenerSupport} instance will result in any<a name="line.58"></a>
<FONT color="green">059</FONT>     * non-{@link Serializable} listeners being silently dropped.<a name="line.59"></a>
<FONT color="green">060</FONT>     *<a name="line.60"></a>
<FONT color="green">061</FONT>     * @param &lt;L&gt; the type of event listener that is supported by this proxy.<a name="line.61"></a>
<FONT color="green">062</FONT>     *<a name="line.62"></a>
<FONT color="green">063</FONT>     * @since 3.0<a name="line.63"></a>
<FONT color="green">064</FONT>     * @version $Id: EventListenerSupport.java 1082302 2011-03-16 21:08:27Z oheger $<a name="line.64"></a>
<FONT color="green">065</FONT>     */<a name="line.65"></a>
<FONT color="green">066</FONT>    public class EventListenerSupport&lt;L&gt; implements Serializable {<a name="line.66"></a>
<FONT color="green">067</FONT>    <a name="line.67"></a>
<FONT color="green">068</FONT>        /** Serialization version */<a name="line.68"></a>
<FONT color="green">069</FONT>        private static final long serialVersionUID = 3593265990380473632L;<a name="line.69"></a>
<FONT color="green">070</FONT>    <a name="line.70"></a>
<FONT color="green">071</FONT>        /**<a name="line.71"></a>
<FONT color="green">072</FONT>         * The list used to hold the registered listeners. This list is<a name="line.72"></a>
<FONT color="green">073</FONT>         * intentionally a thread-safe copy-on-write-array so that traversals over<a name="line.73"></a>
<FONT color="green">074</FONT>         * the list of listeners will be atomic.<a name="line.74"></a>
<FONT color="green">075</FONT>         */<a name="line.75"></a>
<FONT color="green">076</FONT>        private List&lt;L&gt; listeners = new CopyOnWriteArrayList&lt;L&gt;();<a name="line.76"></a>
<FONT color="green">077</FONT>    <a name="line.77"></a>
<FONT color="green">078</FONT>        /**<a name="line.78"></a>
<FONT color="green">079</FONT>         * The proxy representing the collection of listeners. Calls to this proxy<a name="line.79"></a>
<FONT color="green">080</FONT>         * object will sent to all registered listeners.<a name="line.80"></a>
<FONT color="green">081</FONT>         */<a name="line.81"></a>
<FONT color="green">082</FONT>        private transient L proxy;<a name="line.82"></a>
<FONT color="green">083</FONT>    <a name="line.83"></a>
<FONT color="green">084</FONT>        /**<a name="line.84"></a>
<FONT color="green">085</FONT>         * Empty typed array for #getListeners().<a name="line.85"></a>
<FONT color="green">086</FONT>         */<a name="line.86"></a>
<FONT color="green">087</FONT>        private transient L[] prototypeArray;<a name="line.87"></a>
<FONT color="green">088</FONT>    <a name="line.88"></a>
<FONT color="green">089</FONT>        /**<a name="line.89"></a>
<FONT color="green">090</FONT>         * Creates an EventListenerSupport object which supports the specified<a name="line.90"></a>
<FONT color="green">091</FONT>         * listener type.<a name="line.91"></a>
<FONT color="green">092</FONT>         *<a name="line.92"></a>
<FONT color="green">093</FONT>         * @param &lt;T&gt; the type of the listener interface<a name="line.93"></a>
<FONT color="green">094</FONT>         * @param listenerInterface the type of listener interface that will receive<a name="line.94"></a>
<FONT color="green">095</FONT>         *        events posted using this class.<a name="line.95"></a>
<FONT color="green">096</FONT>         *<a name="line.96"></a>
<FONT color="green">097</FONT>         * @return an EventListenerSupport object which supports the specified<a name="line.97"></a>
<FONT color="green">098</FONT>         *         listener type.<a name="line.98"></a>
<FONT color="green">099</FONT>         *<a name="line.99"></a>
<FONT color="green">100</FONT>         * @throws NullPointerException if &lt;code&gt;listenerInterface&lt;/code&gt; is<a name="line.100"></a>
<FONT color="green">101</FONT>         *         &lt;code&gt;null&lt;/code&gt;.<a name="line.101"></a>
<FONT color="green">102</FONT>         * @throws IllegalArgumentException if &lt;code&gt;listenerInterface&lt;/code&gt; is<a name="line.102"></a>
<FONT color="green">103</FONT>         *         not an interface.<a name="line.103"></a>
<FONT color="green">104</FONT>         */<a name="line.104"></a>
<FONT color="green">105</FONT>        public static &lt;T&gt; EventListenerSupport&lt;T&gt; create(Class&lt;T&gt; listenerInterface) {<a name="line.105"></a>
<FONT color="green">106</FONT>            return new EventListenerSupport&lt;T&gt;(listenerInterface);<a name="line.106"></a>
<FONT color="green">107</FONT>        }<a name="line.107"></a>
<FONT color="green">108</FONT>    <a name="line.108"></a>
<FONT color="green">109</FONT>        /**<a name="line.109"></a>
<FONT color="green">110</FONT>         * Creates an EventListenerSupport object which supports the provided<a name="line.110"></a>
<FONT color="green">111</FONT>         * listener interface.<a name="line.111"></a>
<FONT color="green">112</FONT>         *<a name="line.112"></a>
<FONT color="green">113</FONT>         * @param listenerInterface the type of listener interface that will receive<a name="line.113"></a>
<FONT color="green">114</FONT>         *        events posted using this class.<a name="line.114"></a>
<FONT color="green">115</FONT>         *<a name="line.115"></a>
<FONT color="green">116</FONT>         * @throws NullPointerException if &lt;code&gt;listenerInterface&lt;/code&gt; is<a name="line.116"></a>
<FONT color="green">117</FONT>         *         &lt;code&gt;null&lt;/code&gt;.<a name="line.117"></a>
<FONT color="green">118</FONT>         * @throws IllegalArgumentException if &lt;code&gt;listenerInterface&lt;/code&gt; is<a name="line.118"></a>
<FONT color="green">119</FONT>         *         not an interface.<a name="line.119"></a>
<FONT color="green">120</FONT>         */<a name="line.120"></a>
<FONT color="green">121</FONT>        public EventListenerSupport(Class&lt;L&gt; listenerInterface) {<a name="line.121"></a>
<FONT color="green">122</FONT>            this(listenerInterface, Thread.currentThread().getContextClassLoader());<a name="line.122"></a>
<FONT color="green">123</FONT>        }<a name="line.123"></a>
<FONT color="green">124</FONT>    <a name="line.124"></a>
<FONT color="green">125</FONT>        /**<a name="line.125"></a>
<FONT color="green">126</FONT>         * Creates an EventListenerSupport object which supports the provided<a name="line.126"></a>
<FONT color="green">127</FONT>         * listener interface using the specified class loader to create the JDK<a name="line.127"></a>
<FONT color="green">128</FONT>         * dynamic proxy.<a name="line.128"></a>
<FONT color="green">129</FONT>         *<a name="line.129"></a>
<FONT color="green">130</FONT>         * @param listenerInterface the listener interface.<a name="line.130"></a>
<FONT color="green">131</FONT>         * @param classLoader       the class loader.<a name="line.131"></a>
<FONT color="green">132</FONT>         *<a name="line.132"></a>
<FONT color="green">133</FONT>         * @throws NullPointerException if &lt;code&gt;listenerInterface&lt;/code&gt; or<a name="line.133"></a>
<FONT color="green">134</FONT>         *         &lt;code&gt;classLoader&lt;/code&gt; is &lt;code&gt;null&lt;/code&gt;.<a name="line.134"></a>
<FONT color="green">135</FONT>         * @throws IllegalArgumentException if &lt;code&gt;listenerInterface&lt;/code&gt; is<a name="line.135"></a>
<FONT color="green">136</FONT>         *         not an interface.<a name="line.136"></a>
<FONT color="green">137</FONT>         */<a name="line.137"></a>
<FONT color="green">138</FONT>        public EventListenerSupport(Class&lt;L&gt; listenerInterface, ClassLoader classLoader) {<a name="line.138"></a>
<FONT color="green">139</FONT>            this();<a name="line.139"></a>
<FONT color="green">140</FONT>            Validate.notNull(listenerInterface, "Listener interface cannot be null.");<a name="line.140"></a>
<FONT color="green">141</FONT>            Validate.notNull(classLoader, "ClassLoader cannot be null.");<a name="line.141"></a>
<FONT color="green">142</FONT>            Validate.isTrue(listenerInterface.isInterface(), "Class {0} is not an interface",<a name="line.142"></a>
<FONT color="green">143</FONT>                    listenerInterface.getName());<a name="line.143"></a>
<FONT color="green">144</FONT>            initializeTransientFields(listenerInterface, classLoader);<a name="line.144"></a>
<FONT color="green">145</FONT>        }<a name="line.145"></a>
<FONT color="green">146</FONT>    <a name="line.146"></a>
<FONT color="green">147</FONT>        /**<a name="line.147"></a>
<FONT color="green">148</FONT>         * Create a new EventListenerSupport instance.<a name="line.148"></a>
<FONT color="green">149</FONT>         * Serialization-friendly constructor.<a name="line.149"></a>
<FONT color="green">150</FONT>         */<a name="line.150"></a>
<FONT color="green">151</FONT>        private EventListenerSupport() {<a name="line.151"></a>
<FONT color="green">152</FONT>        }<a name="line.152"></a>
<FONT color="green">153</FONT>    <a name="line.153"></a>
<FONT color="green">154</FONT>        /**<a name="line.154"></a>
<FONT color="green">155</FONT>         * Returns a proxy object which can be used to call listener methods on all<a name="line.155"></a>
<FONT color="green">156</FONT>         * of the registered event listeners. All calls made to this proxy will be<a name="line.156"></a>
<FONT color="green">157</FONT>         * forwarded to all registered listeners.<a name="line.157"></a>
<FONT color="green">158</FONT>         *<a name="line.158"></a>
<FONT color="green">159</FONT>         * @return a proxy object which can be used to call listener methods on all<a name="line.159"></a>
<FONT color="green">160</FONT>         * of the registered event listeners<a name="line.160"></a>
<FONT color="green">161</FONT>         */<a name="line.161"></a>
<FONT color="green">162</FONT>        public L fire() {<a name="line.162"></a>
<FONT color="green">163</FONT>            return proxy;<a name="line.163"></a>
<FONT color="green">164</FONT>        }<a name="line.164"></a>
<FONT color="green">165</FONT>    <a name="line.165"></a>
<FONT color="green">166</FONT>    //**********************************************************************************************************************<a name="line.166"></a>
<FONT color="green">167</FONT>    // Other Methods<a name="line.167"></a>
<FONT color="green">168</FONT>    //**********************************************************************************************************************<a name="line.168"></a>
<FONT color="green">169</FONT>    <a name="line.169"></a>
<FONT color="green">170</FONT>        /**<a name="line.170"></a>
<FONT color="green">171</FONT>         * Registers an event listener.<a name="line.171"></a>
<FONT color="green">172</FONT>         *<a name="line.172"></a>
<FONT color="green">173</FONT>         * @param listener the event listener (may not be &lt;code&gt;null&lt;/code&gt;).<a name="line.173"></a>
<FONT color="green">174</FONT>         *<a name="line.174"></a>
<FONT color="green">175</FONT>         * @throws NullPointerException if &lt;code&gt;listener&lt;/code&gt; is<a name="line.175"></a>
<FONT color="green">176</FONT>         *         &lt;code&gt;null&lt;/code&gt;.<a name="line.176"></a>
<FONT color="green">177</FONT>         */<a name="line.177"></a>
<FONT color="green">178</FONT>        public void addListener(L listener) {<a name="line.178"></a>
<FONT color="green">179</FONT>            Validate.notNull(listener, "Listener object cannot be null.");<a name="line.179"></a>
<FONT color="green">180</FONT>            listeners.add(listener);<a name="line.180"></a>
<FONT color="green">181</FONT>        }<a name="line.181"></a>
<FONT color="green">182</FONT>    <a name="line.182"></a>
<FONT color="green">183</FONT>        /**<a name="line.183"></a>
<FONT color="green">184</FONT>         * Returns the number of registered listeners.<a name="line.184"></a>
<FONT color="green">185</FONT>         *<a name="line.185"></a>
<FONT color="green">186</FONT>         * @return the number of registered listeners.<a name="line.186"></a>
<FONT color="green">187</FONT>         */<a name="line.187"></a>
<FONT color="green">188</FONT>        int getListenerCount() {<a name="line.188"></a>
<FONT color="green">189</FONT>            return listeners.size();<a name="line.189"></a>
<FONT color="green">190</FONT>        }<a name="line.190"></a>
<FONT color="green">191</FONT>    <a name="line.191"></a>
<FONT color="green">192</FONT>        /**<a name="line.192"></a>
<FONT color="green">193</FONT>         * Unregisters an event listener.<a name="line.193"></a>
<FONT color="green">194</FONT>         *<a name="line.194"></a>
<FONT color="green">195</FONT>         * @param listener the event listener (may not be &lt;code&gt;null&lt;/code&gt;).<a name="line.195"></a>
<FONT color="green">196</FONT>         *<a name="line.196"></a>
<FONT color="green">197</FONT>         * @throws NullPointerException if &lt;code&gt;listener&lt;/code&gt; is<a name="line.197"></a>
<FONT color="green">198</FONT>         *         &lt;code&gt;null&lt;/code&gt;.<a name="line.198"></a>
<FONT color="green">199</FONT>         */<a name="line.199"></a>
<FONT color="green">200</FONT>        public void removeListener(L listener) {<a name="line.200"></a>
<FONT color="green">201</FONT>            Validate.notNull(listener, "Listener object cannot be null.");<a name="line.201"></a>
<FONT color="green">202</FONT>            listeners.remove(listener);<a name="line.202"></a>
<FONT color="green">203</FONT>        }<a name="line.203"></a>
<FONT color="green">204</FONT>    <a name="line.204"></a>
<FONT color="green">205</FONT>        /**<a name="line.205"></a>
<FONT color="green">206</FONT>         * Get an array containing the currently registered listeners.<a name="line.206"></a>
<FONT color="green">207</FONT>         * Modification to this array's elements will have no effect on the<a name="line.207"></a>
<FONT color="green">208</FONT>         * {@link EventListenerSupport} instance.<a name="line.208"></a>
<FONT color="green">209</FONT>         * @return L[]<a name="line.209"></a>
<FONT color="green">210</FONT>         */<a name="line.210"></a>
<FONT color="green">211</FONT>        public L[] getListeners() {<a name="line.211"></a>
<FONT color="green">212</FONT>            return listeners.toArray(prototypeArray);<a name="line.212"></a>
<FONT color="green">213</FONT>        }<a name="line.213"></a>
<FONT color="green">214</FONT>    <a name="line.214"></a>
<FONT color="green">215</FONT>        /**<a name="line.215"></a>
<FONT color="green">216</FONT>         * Serialize.<a name="line.216"></a>
<FONT color="green">217</FONT>         * @param objectOutputStream the output stream<a name="line.217"></a>
<FONT color="green">218</FONT>         * @throws IOException if an IO error occurs<a name="line.218"></a>
<FONT color="green">219</FONT>         */<a name="line.219"></a>
<FONT color="green">220</FONT>        private void writeObject(ObjectOutputStream objectOutputStream) throws IOException {<a name="line.220"></a>
<FONT color="green">221</FONT>            ArrayList&lt;L&gt; serializableListeners = new ArrayList&lt;L&gt;();<a name="line.221"></a>
<FONT color="green">222</FONT>    <a name="line.222"></a>
<FONT color="green">223</FONT>            // don't just rely on instanceof Serializable:<a name="line.223"></a>
<FONT color="green">224</FONT>            ObjectOutputStream testObjectOutputStream = new ObjectOutputStream(new ByteArrayOutputStream());<a name="line.224"></a>
<FONT color="green">225</FONT>            for (L listener : listeners) {<a name="line.225"></a>
<FONT color="green">226</FONT>                try {<a name="line.226"></a>
<FONT color="green">227</FONT>                    testObjectOutputStream.writeObject(listener);<a name="line.227"></a>
<FONT color="green">228</FONT>                    serializableListeners.add(listener);<a name="line.228"></a>
<FONT color="green">229</FONT>                } catch (IOException exception) {<a name="line.229"></a>
<FONT color="green">230</FONT>                    //recreate test stream in case of indeterminate state<a name="line.230"></a>
<FONT color="green">231</FONT>                    testObjectOutputStream = new ObjectOutputStream(new ByteArrayOutputStream());<a name="line.231"></a>
<FONT color="green">232</FONT>                }<a name="line.232"></a>
<FONT color="green">233</FONT>            }<a name="line.233"></a>
<FONT color="green">234</FONT>            /*<a name="line.234"></a>
<FONT color="green">235</FONT>             * we can reconstitute everything we need from an array of our listeners,<a name="line.235"></a>
<FONT color="green">236</FONT>             * which has the additional advantage of typically requiring less storage than a list:<a name="line.236"></a>
<FONT color="green">237</FONT>             */<a name="line.237"></a>
<FONT color="green">238</FONT>            objectOutputStream.writeObject(serializableListeners.toArray(prototypeArray));<a name="line.238"></a>
<FONT color="green">239</FONT>        }<a name="line.239"></a>
<FONT color="green">240</FONT>    <a name="line.240"></a>
<FONT color="green">241</FONT>        /**<a name="line.241"></a>
<FONT color="green">242</FONT>         * Deserialize.<a name="line.242"></a>
<FONT color="green">243</FONT>         * @param objectInputStream the input stream<a name="line.243"></a>
<FONT color="green">244</FONT>         * @throws IOException if an IO error occurs<a name="line.244"></a>
<FONT color="green">245</FONT>         * @throws ClassNotFoundException if the class cannot be resolved<a name="line.245"></a>
<FONT color="green">246</FONT>         */<a name="line.246"></a>
<FONT color="green">247</FONT>        private void readObject(ObjectInputStream objectInputStream) throws IOException, ClassNotFoundException {<a name="line.247"></a>
<FONT color="green">248</FONT>            @SuppressWarnings("unchecked")<a name="line.248"></a>
<FONT color="green">249</FONT>            L[] listeners = (L[]) objectInputStream.readObject();<a name="line.249"></a>
<FONT color="green">250</FONT>    <a name="line.250"></a>
<FONT color="green">251</FONT>            this.listeners = new CopyOnWriteArrayList&lt;L&gt;(listeners);<a name="line.251"></a>
<FONT color="green">252</FONT>    <a name="line.252"></a>
<FONT color="green">253</FONT>            @SuppressWarnings("unchecked")<a name="line.253"></a>
<FONT color="green">254</FONT>            Class&lt;L&gt; listenerInterface = (Class&lt;L&gt;) listeners.getClass().getComponentType();<a name="line.254"></a>
<FONT color="green">255</FONT>    <a name="line.255"></a>
<FONT color="green">256</FONT>            initializeTransientFields(listenerInterface, Thread.currentThread().getContextClassLoader());<a name="line.256"></a>
<FONT color="green">257</FONT>        }<a name="line.257"></a>
<FONT color="green">258</FONT>    <a name="line.258"></a>
<FONT color="green">259</FONT>        /**<a name="line.259"></a>
<FONT color="green">260</FONT>         * Initialize transient fields.<a name="line.260"></a>
<FONT color="green">261</FONT>         * @param listenerInterface the class of the listener interface<a name="line.261"></a>
<FONT color="green">262</FONT>         * @param classLoader the class loader to be used<a name="line.262"></a>
<FONT color="green">263</FONT>         */<a name="line.263"></a>
<FONT color="green">264</FONT>        private void initializeTransientFields(Class&lt;L&gt; listenerInterface, ClassLoader classLoader) {<a name="line.264"></a>
<FONT color="green">265</FONT>            @SuppressWarnings("unchecked")<a name="line.265"></a>
<FONT color="green">266</FONT>            L[] array = (L[]) Array.newInstance(listenerInterface, 0);<a name="line.266"></a>
<FONT color="green">267</FONT>            this.prototypeArray = array;<a name="line.267"></a>
<FONT color="green">268</FONT>            createProxy(listenerInterface, classLoader);<a name="line.268"></a>
<FONT color="green">269</FONT>        }<a name="line.269"></a>
<FONT color="green">270</FONT>    <a name="line.270"></a>
<FONT color="green">271</FONT>        /**<a name="line.271"></a>
<FONT color="green">272</FONT>         * Create the proxy object.<a name="line.272"></a>
<FONT color="green">273</FONT>         * @param listenerInterface the class of the listener interface<a name="line.273"></a>
<FONT color="green">274</FONT>         * @param classLoader the class loader to be used<a name="line.274"></a>
<FONT color="green">275</FONT>         */<a name="line.275"></a>
<FONT color="green">276</FONT>        private void createProxy(Class&lt;L&gt; listenerInterface, ClassLoader classLoader) {<a name="line.276"></a>
<FONT color="green">277</FONT>            proxy = listenerInterface.cast(Proxy.newProxyInstance(classLoader,<a name="line.277"></a>
<FONT color="green">278</FONT>                    new Class[] { listenerInterface }, createInvocationHandler()));<a name="line.278"></a>
<FONT color="green">279</FONT>        }<a name="line.279"></a>
<FONT color="green">280</FONT>    <a name="line.280"></a>
<FONT color="green">281</FONT>        /**<a name="line.281"></a>
<FONT color="green">282</FONT>         * Create the {@link InvocationHandler} responsible for broadcasting calls<a name="line.282"></a>
<FONT color="green">283</FONT>         * to the managed listeners.  Subclasses can override to provide custom behavior.<a name="line.283"></a>
<FONT color="green">284</FONT>         * @return ProxyInvocationHandler<a name="line.284"></a>
<FONT color="green">285</FONT>         */<a name="line.285"></a>
<FONT color="green">286</FONT>        protected InvocationHandler createInvocationHandler() {<a name="line.286"></a>
<FONT color="green">287</FONT>            return new ProxyInvocationHandler();<a name="line.287"></a>
<FONT color="green">288</FONT>        }<a name="line.288"></a>
<FONT color="green">289</FONT>    <a name="line.289"></a>
<FONT color="green">290</FONT>        /**<a name="line.290"></a>
<FONT color="green">291</FONT>         * An invocation handler used to dispatch the event(s) to all the listeners.<a name="line.291"></a>
<FONT color="green">292</FONT>         */<a name="line.292"></a>
<FONT color="green">293</FONT>        protected class ProxyInvocationHandler implements InvocationHandler {<a name="line.293"></a>
<FONT color="green">294</FONT>            /** Serialization version */<a name="line.294"></a>
<FONT color="green">295</FONT>            private static final long serialVersionUID = 1L;<a name="line.295"></a>
<FONT color="green">296</FONT>    <a name="line.296"></a>
<FONT color="green">297</FONT>            /**<a name="line.297"></a>
<FONT color="green">298</FONT>             * Propagates the method call to all registered listeners in place of<a name="line.298"></a>
<FONT color="green">299</FONT>             * the proxy listener object.<a name="line.299"></a>
<FONT color="green">300</FONT>             *<a name="line.300"></a>
<FONT color="green">301</FONT>             * @param proxy the proxy object representing a listener on which the<a name="line.301"></a>
<FONT color="green">302</FONT>             *        invocation was called.<a name="line.302"></a>
<FONT color="green">303</FONT>             * @param method the listener method that will be called on all of the<a name="line.303"></a>
<FONT color="green">304</FONT>             *        listeners.<a name="line.304"></a>
<FONT color="green">305</FONT>             * @param args event arguments to propagate to the listeners.<a name="line.305"></a>
<FONT color="green">306</FONT>             * @return the result of the method call<a name="line.306"></a>
<FONT color="green">307</FONT>             * @throws Throwable if an error occurs<a name="line.307"></a>
<FONT color="green">308</FONT>             */<a name="line.308"></a>
<FONT color="green">309</FONT>            public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {<a name="line.309"></a>
<FONT color="green">310</FONT>                for (L listener : listeners) {<a name="line.310"></a>
<FONT color="green">311</FONT>                    method.invoke(listener, args);<a name="line.311"></a>
<FONT color="green">312</FONT>                }<a name="line.312"></a>
<FONT color="green">313</FONT>                return null;<a name="line.313"></a>
<FONT color="green">314</FONT>            }<a name="line.314"></a>
<FONT color="green">315</FONT>        }<a name="line.315"></a>
<FONT color="green">316</FONT>    }<a name="line.316"></a>




























































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